Perhaps you should try some spelling variations:
scale studenten » scale student, schuler studenten, alte studenten
die filosofia » di filosofia, e filosofia, da filosofia
de filosofia » e filosofia, di filosofia, la filosofia
e literatura » de literatura, y literatura, e literatur
tests scale » tests stable, sets scale, tests safe

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "tests scale studenten ((die filosofia) OR (de filosofia)) e literatura".
• Adding a wildcard symbol may retrieve word variants: tests scale studenten ((die filosofia) OR (de filosofia)) e literatura*.